One-step synthesis of nitrogen-doped carbon nanofibers from melamine over nickel alloy in a closed system

A novel approach to the synthesis of nitrogen-doped carbon nanofibers in a closed system at elevated pressure with the use of bulk Ni-Cr alloy as a catalyst precursor was proposed. Melamine was chosen as a substrate containing both carbon and nitrogen. Method of ferromagnetic resonance was applied for diagnostics of dispersed Ni particles appearance. The process of corrosion of a bulk alloy followed by formation of dispersed Ni particles catalyzing the growth of nitrogen-doped carbon nanofibers was found to take place at temperatures above 560 degrees C. The final content of nitrogen in obtained carbon nanofibers was about 10 at.%. (C) 2017 Elsevier B.V. All rights reserved.